1. Tilich, D.S.: Energy consumption of Romanias’ development regions.
2. Heinz, P. B and Soares, C.: “Turboexpanders and Process Applications”, ISBN 978-0-88415-509-6.
3. Rheuban, J.: “Turbo expanders: Harnessing the Hidden Potential of Our Natural Gas Distribution System”, Article, March 9th, 2009.
4. Mirandola, A. and Minca, L.: “Energy Recovery by Expansion of High Pressure Natural Gas”, Proc.of the 21st Intersociety Energy Conversion Engineering Conference, Vol. 1, pp. 16-21, San Diego, California, Aug. 25-29, 1986.
5. Mirandola, A. and Macor, A.: “Experimental Analysis of an Energy Recovery Plant by Expansion of Natural Gas”, Proc. of the 23rd Intersociety Energy Conversion Engineering Conference, Vol. 4, pp. 33-38, Denver, Colorado, July 31-Aug. 5, 1988.